Prefabricated building structure

ABSTRACT

A prefabricated building structure generally consisting of at least two modular units having complementary roof systems secured together to provide an integral building structure, each of the complementary roof systems including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to the stationary roof section, the stationary roof section having upwardly projecting seating means, the movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to the depending support means whereby the extension leg may be moved away from the seating means and the depending support means may be seated on the seating means to support the movable roof section in a downwardly disposed, inoperative position, and the extension leg may be moved between the depending support means and the seating means and seated on the seating means to support the movable roof section in an upwardly disposed, operative position, means rigidly interconnecting the opposed free ends of the movable roof sections of the complementary roof systems when the movable roof sections are upwardly disposed in their operative position, and means for covering the roof systems when the movable roof section are disposed in their operative positions.

( 5] Apr. 17, 1973 PREFABRICATED BUILDING ABSTRACT STRUCTURE If f m fi m mm w m m mud w w {I v S, e m mm m mwm m mmgm ahwe wm ome sm ym e ml mkm m om m m w m.m mm m m m m m a r e mm momww fl m o dmww y x mmmemmdmmwewa t. r. mmw Sd m m m m ilf u 0. 0 mo t IV S fiw mvn am 5.; m m w yh 8 m m l mmmm m e w mm m mmmm wfim om .d .m mw mmn mm mmmm m m wmm iwd .b t .C e

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ineans and the depending support means may be seated on the seating means to support the movable roof section in a downwardly disposed, inoperative position, and the extension leg may be moved between the depending support means and the seating means and seated on the seating means to su UNITED STATES PATENTS 3,605,355 9/1971 Solesbee........ 3,701,225 10/1972 Perry..... 2,115,615 4/1938 Brunner 2,395,691

pport the mova- 2/1946 Smith. 3,348,344 10/1967 Tatevossian." ble roof section in an upwardly disposed, operative 3,562,973 3,638,373

pposed ee ends of the movable roof sections of the complementary roof systems when the movable roof sections 2/1971 Gangemi....... 2/1972 position, means rigidly interconnecting the 0 fr FOREIGN PATENTS OR APPLICATIONS are upwardly disposed in their operative position, and

52/641 means for covering the roof systems when the movable roof section are disposed in their operative positions.

155,462 12/1920 Great 679,048 2/1952 Great Britain......

Primary EJ c aminer-John E. Murtagh 52 Claims, 16 Drawing Figures Attorney-Mason, Fenwick & Lawrence PATENTEDAPR 1 71973 SHEET 2 OF 6 IN VENTOR aw figwmi.

ATTORNEYS PATENTED APR 1 71915 SHEET 3 [1F 6 INVENTOR JOHN DILLAZD OWELL PATENTEU APR 1 7 I975 SHEET 5 BF 6 R O N E V m JOHN Dumas cweu.

ATTORNEYS PATENTEI] APR] 7 975 SHEU 6 [1F 6 INVENTOR J'oHN Dmumzo Poweu.

' ATTORNEYS 1 PREFABRICATED BUILDING STRUCTURE or spaced relation, and secured together to provide a completed building structure ready for occupancy upon connecting the various utility lines. The invention further contemplates a modular building unit having a novel roof system which facilitates the transportation of the modular units from the manufacturing site to the final erection site.

In the building construction industry, there has been developed and extensively used, a technique for constructing building structures which consists of fabricating modular building units at a manufacturing site, hauling such units on vehicles to remote erection sites, transferring the units from the hauling vehicles onto a foundation at the erection site, securing the units together on the foundation to form an integral building .structure,-and then connecting the electrical, water and sewage lines of the structure to appropriate utility lines. The use of such technique has enabled the use of mass production methods in the fabrication of building structures, thus providing increased economy, improved product quality and reduced construction time.

Since prefabricated modular units must be trans ported over public highways from a manufacturing site to remote erection sites, one of the principal limiting factors in the design of building structuresconstructed of modular units, has been the restrictions on the size of modular units transported over public highways either imposed by municipal, county and state governments, or dictated by highway conditions such as road and tunnel widths, clearance heights of underpasses, and the like. Generally, municipal, county and state governments have adopted various vehicle ordinances restricting the height, width and length of. any unit transported over public highways.

ln order to provide modular units with standard ceiling heights and overall building heights falling within height restrictions imposed by law or dictated by road conditions, it has been the contentional practice in the prefabricated building industry todesign and fabricate modular units for residential building structures having roof pitches less than standard roof pitches. Although the use of roofs with substandard pitches has been effective in maintaining the heights of the units within lawfully permissible limits, the use of substandard pitches also has resulted in a less attractive building design which correspondingly has a detrimental effect on the saleability of the building structures. It thus has been found to be desirable to provide a prefabricated building structure consisting of two or more modular units, which is provided with a standard roof pitch and in which the heights of the modular units fall within the permissible height limitations with respect to hauling the units over the public highways.

Accordingly, it is the principal object of the present invention to provide a novel prefabricated building structure.

Another object of the present invention is to provide a novel prefabricated building structure consisting of two or more prefabricated modular units secured together to form an integral building structure.

A further object of the present invention is to provide a novel prefabricated residential building structure having a pitched roof wherein the pitch of the roof is standard.

A still further object of the present invention is to provide a novel prefabricated building structure consisting of two or more modular units which may be fabricated at a manufacturing site andtransported to a remote erection site and secured together to form an integral building structure.

Another object of the present invention is to provide a novel prefabricated building structure consisting of two or more modular units fabricated at a manufacturing site and transported to a remote erection site to be secured together to form an integral building structure wherein the modular units are provided with widths, lengths and heights which fall within the permissible dimensional limitations imposed by municipal, county and state governments with respect to the size of objects hauled over the public highways.

A further object of the present invention is to provide a prefabricated residential building structure having a roof of standard pitch, consisting of two or more modular units secured together at an erection site to form an integral building structure wherein the modu lar units are provided with widths, lengths and heights which fall within the dimensional limitations imposed by municipal, county or state governments with respect to the size of objects hauled over the public highways.

A still further object of the present invention is to provide a novel prefabricated modular unit.

A further object of the present invention is to provide a novel modular unit which may be fabricated at a manufacturing site utilizing mass production methods and techniques, and transported to a final erection site and secured to one or more similar units on a foundation to provide an integral building structure.

Another object of the present invention is to provide a novel prefabricated modular unit having a collapsible roof system.

A further object of the present invention is to provide a novel prefabricated modular unit having a collapsible roof system which may be collapsed to reduce the height of the unit for transportation over the public highways, and which may be jacked up and permanently secured to a complementary roof system of a similar modular unit at an erection site to provide an integral building structure.

A still further object of the present invention is to provide a prefabricated modular unit having a collapsible roof system which is simple in construction, comparatively inexpensive to manufacture, and readily adapted to be moved and secured to a permanent position as a component of an integral building structure.

Other objects and advantages of this invention will become more apparent to a person having ordinary skill in the art to which the invention pertains, from the following description taken in conjunction with the accompanying drawings wherein:

FIG. 1 is a perspective view of an embodimentof the invention, having portions thereof broken away;

F IG. 2 is a perspective view of a pair of modular units utilized in forming the embodiment illustrated in FIG.

l, illustrating the complementary roof systems thereof in collapsed or inoperative positions;

FIG. 3 is an enlarged cross sectional view taken along line 3--3 in FIG. 1;

FIG. 4 is an enlarged cross sectional view taken along line 4-4 in FIG. 2;

FIG. 5 is an enlarged fragmentary view of one of the complementary roof systems of the modular units illustrated in FIGS. 1 through 4;

FIG. 6 is a perspective view of another embodiment of the invention, having portions thereof broken away;

FIG. 7 is a perspective view of a modular unit utilized in the embodiment illustrated in FIG. 6, illustrating the complementary roof system in a collapsed or inoperative position;

FIG. 8 is an enlarged cross-sectional view taken along line 8-8 in FIG. 6;

FIGS. 9a and 9b are views similar to the view shown in FIG. 8, illustrating sequential positions of the components of the complementary roof system of a modular unit, as the roof system is collapsed or moved into its inoperative position;

FIG. 10 is an enlarged fragmentary view of the components of the roof system illustrated in FIG. 9b, having portions thereof broken away;

FIG. 1 1 is a perspective view of still another embodiment of the invention having portions thereof broken away;

FIG. 12 is a perspective view of a pair of modular units utilized in forming the embodiment shown in FIG. 11, illustrating the complementary roof systems in their collapsed or inoperative positions;

FIG. 13 is a cross-sectional view taken along line 13-13 in FIG. 11;

FIG. 14 is a cross-sectional view taken along line 14-14 in FIG. 12; and

FIG. 15 is an enlarged fragmentary view of a portion of one of the modular units illustrated in FIGS. 11 through 14.

In accordance with the broad aspects of one embodiment of the invention, the invention relates to a prefabricated building structure comprising at least two modular units secured together in side-by-side relation to provide an integral building structure, each of the 'modular units having a complementary roof system including a longitudinally disposed, stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to the stationary roof section. The stationary roof section is provided with an upwardly projecting seating means and the movable roof section is provided with rigidly connected, depending support means and an extension leg hingedly connected to the depending support means 'whereby the extension leg may be moved away from the seating means and the depending support means may be seated on the seating means to support the movable roof section, in a downwardly disposed, inoperative position, and the extension leg may be moved between the depending support means and the seating means'and seated on the seating means to support the movable r'oof section in an upwardly disposed, operative position. In addition, means are provided for rigidly interconnecting the opposed free ends of the movable roof sections of the complementary roof systems when the movable roof sections are upwardly disposed in their operative positions, and means are provided for covering the roof systems when the movable roof sections are disposed in their operative positions.

In another embodiment of the invention, there is provided a prefabricated building structure comprising at least three modular units secured together in side-byside relation to provide an integral building structure, the modular units including an interior modular unit interposed between a pair of exterior modular units. Each of the exterior modular units is provided with a complementary roof system including a longitudinally disposed stationary roof section, a first longitudinally disposed movable roof section hingedly connected along a longitudinal axis to the stationary roof section, and a second longitudinally disposed movable roof section hingedly connected along a longitudinal axis to the first movable roof section. The stationary roof section includes an upwardly projecting seating means, and the first movable roof section is provided with a rigidly connected, depending support means and an extension leg hingedly connected to the depending support means whereby the extension leg may be moved away from the seating means and the depending support means may be seated on the seating means to support the first movable roof section in a downwardly disposed, inoperative position, and the extension leg may be moved between the depending support means and the seating means and seated on the seating means to support the first movable roof section in an upwardly disposed, operative position. The second movable roof section is movable outwardly onto the first movable roof section into an inwardly projecting operative position, overlying a portion of the interior modular unit and engaging at its free end the free end of the second movable roof section of the complementary roof system of the other exterior modular unit, disposed in an operative position. In addition, means are provided for rigidly interconnecting the opposed free ends of the second movable roof sections of the complementary roof systems of the exterior modular units when the movable roof sections are disposed in their operative positions, and means are provided for covering the roof systems when the movable roof sections are disposed in their operative positions.

In still another embodiment of the invention, there is provided a prefabricated building structure consisting of at least three modular units secured together in sideby-side relation to provide an integral building structure, the modular unit including an interior modular unit interposed between a pair of exterior modular units. The interior modular unit is provided with a component roof system which may be moved from a collapsed position to a raised, operative position and secured to the component roof systems of the exterior modular units, disposed in their operative positions to form an integral roof system.

Referring to FIGS. 1 through 5, there is illustrated a first embodiment of the invention. The embodiment consists of a prefabricated building structure 20 formed from a pair of substantially similar modular units 21 and 22 disposed in side-by-side relation and rigidly secured together to form an integral structure. The modular unit 21 consists of a housing assembly 23 provided with a conventional floor system, a plurality of exterior walls 24 mounted on the floor system, and an interior junction wall 25, and a component roof system 26 which is secured to the upper end of the housing assembly. Similarly, the modular unit 22 consists of a housing assembly 23a provided with exterior walls 24a and junction wall 25a engageable with the interior junction wall 25 of modular unit 21, and a component roof system 26a.

The component roof system 26 includes a stationary roof section 27, a movable roof section 28 and an overhang section 29. The stationary roof section 27 consists of a plurality of transverselydisposed, longitudinally spaced bottom truss chord components 30, a plurality of vertical truss components 31 secured to the bottom truss chord components 30 intermediate the ends thereof by means of nail plates 32, a plurality of top truss chord components 33 interconnecting the outer ends of the bottom truss chord components 30 and the upper ends of the vertical truss components 31 by means of nail plates 34 and 35 and a plurality of diagonal truss components 36 interconnecting the upper ends of the vertical truss components 31 and the inner ends of the bottom truss chord components 30 by means of nail plates 35 and 37. The top truss chord components 33 are set at a standard roof pitch, on

which there is applied plywood sheathing 38, a layer 39 l of felt or similar material and asphalt shingles 40, as best illustrated in FIG. 5. In addition, the stationary roof section 27 is provided with a plurality of upwardly and slightly outwardly extending truss components 41 which are disposed at the inner ends of the bottom truss components 30 and secured thereto by means of nail plates 37.

The movable roof section 28 is provided with a plurality of top truss chord components 42 which are hingedly connected to the outer upper ends of the diagonal truss components 36 by means of strap hinges 43. As best illustrated in FIG. 5, roofing is applied to the top truss chord components 42, which consists of plywood sheathing 43, a layer 44 of felt or similar material, and asphalt shingles 45. When the top truss chord components 42 are disposed in alignment with the top truss chord components 33 as illustrated in FIGS. 1, 3 and 5, the layers of sheathing, felt and shingles also are disposed in alignment to provide a continuous roof line. The break between the top truss chord components 33 and 42 is sealed from the exterior by means of a strip of stretchable material bridging the break and secured to the sheathing on the top truss chord components 33 and 42.

Depending from the inner end of the top truss chord components 42 is a rigidly secured support frame assembly 47 having a hingedly connected extension leg frame assembly 48. The frame assembly 47 consists ofa longitudinally disposed beam 49 nailedto the undersides of the inner ends of the top truss'chord components 42, a plurality of depending truss components 50 disposed in the same planes as the top truss chord components 42, a longitudinally disposed beam 51 nailed to the undersides of the depending truss components 50, and a longitudinally disposed strip 52 applied to the outer sides of the beams 49 and 51 and the depending truss components 50. The extension leg frame assembly 48 consists of a longitudinally disposed beam 53, a spaced, longitudinally disposed beam 54 and a plurality of longitudinally spaced truss com ponents 55 interconnecting the beams 53 and 54. As best illustrated in FIG. 1, the truss components 52 and 55 of the frame assemblies 47 and 48 lie in the same transverse planes as the truss components 30, 31, 33, 36 and 42. Furthermore, the frame assembly 48 is hingedly connected to the lower end of the depending frame assembly 47 by means of a plurality of strap hinges 56 so that the frame assembly 48 may be swung inwardly and positioned in alignment with the frame assembly 47 and the diagonal truss chord components 41 to form a plurality of longitudinally spaced, diagonal truss components supporting the movable roof section 28 in an operative position, as illustrated in FIGS. 1 and 3, with the top truss chord components 42 disposed in alignment with the top truss chord components 33, and may be swung outwardly clear of the lower of the frame assembly 47 to permit the movable roof section 28 to swing downwardly about the common longitudinal axis of the hinges 43, and the lower end of the support frame assembly 47 to rest on the upper end of the truss chord components 41 as illustrated in FIGS. 2 and 4, whereby the movable roof section 28 will be disposed in a collapsed or inoperative position.

The overhang section 29 consists of a plurality of longitudinally spaced beams 57 hingedly connected to the outer ends of top truss chord. components 33 by means of strap hinges 58, a plurality of beams 59 nailed to the outer ends of the beams 57 and extending inwardly, and a longitudinally disposed strip 60 nailed to the inner ends of the beams 57 and 59. The overhang section furthermore is provided with a fascia board 61 nailed to the outer ends of the beams 57, a soffet 62 nailed to the undersides of the beams 59, and roofing applied to the upper ends of the beams 57 similar to the roofing applied to the top truss chord components 33 and 42. In addition, the hinged connection of the overhang section 29 to the outer end of the stationary roof section 27 may be sealed by means of a longitudinally disposed stretchable material bridging the break between and secured to the sections. The overhang section 29 may be swung inwardly and rested on the stationary roof section 27 as illustrated in FIGS. 2 and 4, in an operative position, to decrease the width of the modular unit 21 while in transit, and may be swung outwardly to a laterally projecting operative position as illustrated in FIGS. 1 and 3 to extend the roof line of the building structure.

When the modular units 21 and 22 are disposed in side-by-side relation with the interior junction walls 25 and 26 engaging, and the movable roof sections 28 are in their upwardly disposed operative positions, the roof sections 28 and 280 are rigidly interconnected by means of ridge blocking 63 which are nailed to the opposed free ends of the top truss chord components 42 and 42a. The gable ends of the building structure further are provided with siding 64 nailed to the exterior trusses, louver sections 64 nailed to the outer trusses when the movable roof sections are in their upwardly disposed operative positions, and trim sections 65 nailed to the overhang portions of the roof system.

The modular units 21 and 22 are intended to be fabricated at a manufacturing site utilizing mass production methods and techniques. When the units have been completed at the manufacturing site, the

movable roof section 28 is moved to its inoperative position with the lower end of the support frame assembly 47 resting on the upper ends of the truss chord components 41 and the extension leg frame assembly 48 resting on the inner ends of the diagonal truss components 36 of the stationary roof section 27, to reduce the overall height of the modular unit, as illustrated in FIGS. 2 and 4. Similarly, the roof section 28a of unit 22 is lowered to its inoperative position. The overhang sections 29 and 29a also are swung inwardly and rested on the stationary roof sections 27 and 27a to decrease the overall width of the units. The units are then mounted on trailers or dolleys and hauled to a final erection site for the final building structure. When the units arrive at the erection site, they are positioned adjacent the foundation site and transferred from the trailer or dolley onto the foundation site by any suitable means including the use of a crane or helicopter, and preferably by the use of a transfer system as disclosed in my U. S. Pat. No. 3,231,121 granted on Jan. 25, 1966.

The units are positioned on the foundation in sideby-side relation with the interior junction walls 25 and 25a engaging, and are rigidly secured together by means of bolts or other suitable means. After the units have been rigidly secured together, the overhang units are swung outwardly to their laterally projecting positions and secured in place by any suitable means. The movable roof sections 28 and 280 are then raised to their operative positions as illustrated in FIGS. 1 and 3 by the use of lifting jacks. When the movable roof sections have been jacked up to a sufficient height, the extension leg frame assemblies 48 and 48a are swung inwardly into alignment with the frame assemblies 47 and 47a and the truss chord components 41 and 41a, respectively. The movable roof sections are then lowered so that the longitudinally disposed lower beams 54 and 54a of the extension leg frame assemblies 48 and 48a are seated on the upper ends of the truss chord components 41 and 41a, respectively, to support the movable roof sections in their upwardly disposed operative positions, as illustrated in FIGS. 1 and 3, with the top truss chord components 42 and 42a disposed in alignment with the top truss chord components 33 and 33a, respectively, to provide a roof configuration having a standard roof pitch. It will be noted that the overhang sections 29 and 29a function to extend the roof line of the building structure.

After the movable roof sections 28 and 280 have been rigidly secured in their outwardly disposed operative positions, the strips 52 and 52a are nailed to the frame assemblies 47 and 47a, and the ridge blocking 63 is nailed to the opposed free ends of the top truss chord components 42 and 42a to thus provide a plurality of transversely disposed, longitudinally spaced trusses as illustrated in FIG. 1. The roofing is completed by applying sheathing, a layer of felt or similar material and shingels along the ridge of the completed roof, applying additional courses 64 and 64a of shingles along the junctures of the top truss chord components 33 and 42, and 33a and 42a, and applying additional courses of shingles across the hinged connections of the overhang sections 29 and 290 with the stationary roof sections 27 and 27a.

The siding 64 on the gable ends of the modular units extends vertically up to the break point between the chord components 33 and 42, which thus enables such siding to be applied at the manufacturing site. In addition, the outer portions of the trim sections 65 and 65a also are applied at the manufacturing site. The louver sections 64 and 64a are applied at the erection site after the roof has been completed, to complete the erection of the building structure. Finally, the electrical, water and sewage lines are connected to the appropriate utilities, and the building structure is ready for occupancy.

it will be noted that the collapsible roof sections 28 and 28a, and the inwardly swingable sections 29 and 29a provide a compact modular unit which will have a height and width falling within the presecribed dimensional limits for objects transported over public highways. In addition, the particular roof construction of the modular units permits the erection of a final building structure with a roof having a standard pitch and an overhang.

Referring to FIGS. 6 through 10, there is illustrated a second embodiment of the invention. Such embodiment consists of a prefabricated building structure consisting of an interior modular unit 71 interposed between a pair of modular units 72 and 73. The interior modular unit 71 consists of a housing assembly 74 provided with exterior walls 75 and interior junction walls 76. The exterior modular unit 72 is substantially similar in construction to the exterior modular unit 73, and includes a housing assembly 77 and a component roof system 78 supported on the housing assembly 77. The housing assembly 77 is provided with a conventional floor system, exterior walls 79 mounted on the floor system, and an interior junction wall 80 which engages the junction wall 76 of the interior modular unit 71 when the modular units are secured together in side-byside relation to provide an integral structure. The exterior modular unit 73 similarly is provided with a housing assembly 77a on which there is supported a component roof system 78a. The housing assembly 77a is provided with a conventional floor system, exterior walls 79a mounted on the floor system, and an interior junction wall which engages an interior junction wall of the interior modular unit 71 when the units are disposed in side-byside relation and secured together.

The component roof system 78 includes a stationary v roof section 81, a first movable roof section 82, a second movable roof section 83, and an overhang section 84. The stationary roof section consists of a plurality of transversely disposed, longitudinally spaced bottom truss chord components 85, a plurality of vertical truss components 86 secured to the bottom truss chord components intermediate the ends thereof by means of nail plates 87, a plurality of top truss chord components 88 interconnecting the outer ends of the bottom truss chord components 85 and the upper ends of the vertical truss components 86 by means of nail plates 89 and 90, and a plurality of diagonal truss components 91 interconnecting the upper ends of the vertical truss components 86 and the inner ends of the bottom truss chord components 85 by means of nail plates 90 and 92. The top truss chord components 88 are set at a standard roof pitch, on which there is applied layers of plywood sheathing, felt or a similar material and asphalt shingles, as described in connection with the embodiment illustrated in FIGS. 1 through 5. In ad dition, the stationary roof section 81 is provided with a plurality of upwardly and outwardly extending diagonal truss components 91 which are disposed at the inner ends of the bottom truss chord components 85 and secured thereto by means of nail plates 92.

The movable roof section 82 is provided with a plurality of top truss chord components 94 which are hingedly connected to the outer upper ends of the diagonal truss components 91 by means of strap hinges 95. A similar roofing is applied to the top truss chord components 94, consisting of layers of plywood sheathing, felt or similar material and asphalt shingles. When the top truss chord components 94 are disposed in alignment with the top truss chord components 88, as illustrated in FIGS. 6 and 8, the layers of sheathing, felt and shingles also are disposed in alignment with the roofing on the'stationary roof section 81 to provide a continuous roof line. The break in the top truss chord between the components 88 and 94 is sealed from the exterior by means of a strip of stretchable material bridging the break and secured to the sheathing on top truss chord components 88 and 89.

As best illustrated in FIG. 10, a depending support frame assembly 96 is rigidly secured to the underside of the free ends of the top truss chord components 94, which is provided with a hingedly connected extension leg frame assembly 97. The frame assembly 96 consists of a longitudinally disposed beam 98 nailed to the undersides of the. inner ends of the top truss chord components 94, a plurality of depending diagonal truss components 99 disposed in the same transverse planes as the top truss chord components 94 and the upwardly projecting diagonal truss components 93, and a longitudinally disposed beam 100 nailed to the undersides of the depending diagonal truss chord components 99. The extension leg frame assembly 97 consists of a longitudinally disposed beam 101, a spaced, longitudinally disposed beam 102 and a plurality of longitudinally spaced, diagonal truss components 103 interconnecting the beams and 102. As best shown in FIG. 6, the diagonal trust components 99 and 103 of the frame assemblies 96 and 97 lie in the same transverse planes as the truss components 85, 86, 88, 91 93 and 94. Furthermore, the frame assembly 97 is hingedly connected to the lower end of the depending frame assembly 96 by means of a plurality of longitudinally spaced strap hinges 104 so that the frame assembly 97 may be swung inwardly and positioned in alignment with the frame assembly 96 and the diagonal truss chord components 93 to form a plurality of longitudinally spaced, diagonal truss. chords supporting the movable roof section 82 in an upwardly disposed, operative position, as illustrated in FIGS. 6, 8 and 9a, with the top truss chord components 94 disposed in alignment with the top truss chord components 88, and may be swung outwardly clear of the lower end of the frame assembly 96, to permit the movable roof section 82 to swing downwardly about the common longitudinal axis of the hinges 95, and the lower end of the support frame assembly 96 to rest on the upper ends of the diagonal truss chord components 93, as illustrated in FIGS. 9b and 10, whereby the movable roof section 82 will be disposed in the collapsed or inoperative position.

The second movable section 83 consists of a plurality of transversely disposed, longitudinally spaced top truss chord components 105 which are hingedly connected to the top truss chord components 94 of the first movable roof section 82. Roofing consisting of layers of plywood sheathing, felt and asphalt shingles, is applied to the upper side of the top truss chord components 105 so that when the top truss chord components 105 are disposed in alignment with the top truss chord components 88 and 94 as illustrated in FIG. 8, there will be provided a continuous roof line of shingles.

The hinged connection between the first movable roof section 82 and the second movable roof section 83 permits the top truss chord components 94 and 105 to be disposed in alignment as illustrated in F IG. 8 or the second movable roof section 83 to be swung outwardly and rested in a collapsed or inoperative position on the upper side of the first movable roof section 82, as illustrated in FIGS. 9b and 10. Each of the top truss chord components 105 is provided with a pivotally connected brace member 106 which is adapted to be secured to an opposed top truss chord component 105a of the complementary roof system 78a to rigidly interconnect the roof systems 78 and 78a. The pivotally connected brace 106 also may be swung outwardly and laid to rest on the plywood sheathing applied to the top truss chord components 105, as illustrated in FIGS. 91:, when the roof section 83 is in the inoperative position.

As best illustrated in FIGS. 6 and 8, when the second movable roof sections 83 and 83a are disposed in their inwardly projecting operative positions, interconnected by the bracing members 106 and secured together at their engaging free ends by means of wooden or metal gusset plates 107, the roof sections will overlie the interior modular unit 71.

The overhang section 84 consists of a plurality of longitudinally spaced beams 108 hingedly connected to the outer ends of the top truss chord components 88 by' means of strap hinges, a plurality of beams 109 nailed to the outer ends of the beams I08 and extending inwardly, and a longitudinally disposed strip 110 nailed to the inner ends of the beams 108 and 109. The overhang section furthermore is provided with a fascia board nailed to the outer ends of the beams 108, a soffet nailed to the undersides of the beams 109 and roofing consisting of plywood sheathing, felt and asphalt shingles applied to the upper sides of the beams 108.

'The. overhang section 84 may be swung into an in operative position resting on the outer end of the stationary roof section 81, as illustrated in FIGS. 7, 9a and 9b, or swung into an operative position projecting laterally from the stationary roof section, as illustrated in FIGS. 6 and 8, to extend the roof line of the building structure. When the overhang section 84 is disposed in the operative position, the beams 108 are disposed in alignment with the top truss chord components 88 of the stationaryroof section to provide a continuous roof line having a standard roof pitch. As best illustrated in FIG. 6, the gable ends of the modular units are provided with siding 111 which extends to a height even with the break between the top truss chord components 88 and 94. Above the siding 111, the opening is closed by louver sections 112 which are applied at the erection site. i

As described in connection with the embodiment of the invention illustrated in FIGS. 1 through 5, the

modular units 71, 72 and 73 are prefabricated at a manufacturing site utilizing mass production methods and techniques. When the units have been completed, the roof systems 78 and 78a of the exterior modular units 72 and 73 are collapsed into their inoperative positions for transit. This is accomplished with the exterior modular unit 82 by swinging the overhang section 84 inwardly so that it comes to rest on the stationary roof section 81, swinging the movable roof section 83 inwardly as illustrated in FIG. 9a so that it comes to a rest on the movable roof section 82 lifting the movable roof section 82, to remove the load on the frame assembly 97 and then swinging the frame assembly 97 inwardly, and then lowering the movable roof section 82 to permit the lower end of the frame assembly 96 to rest on the upper ends of the diagonal truss components 93 and the frame assembly 97 to rest on the diagonal truss components 91. The roof system 78a of exterior modular unit 73 is collapsed into an inoperative position in a similar manner.

When the roof systems for the modular units 72 and 73 have been collapsed into their inoperative positions, providing compact units of minimum width and height, the units are loaded on trailers or dolleys and hauled over public highways to an erection site provided with a foundation. The units are then transferred onto the foundation so that the units are disposed in side-by-side relation with the interior modular units 71 interposed between the exterior modular units 72 and 73. With the units thus positioned, they are rigidly bolted together.

Next, lifting jacks are placed at spaced positions along the lengths of the movable roof sections 82 and 82a and such sections are jacked up to the positions as illustrated in FIGS. 6 and 8. With the jacks carrying the load of the movable roof sections, the frame assemblies 96 and 96a are swung inwardly into alignment with the frame assemblies 96 and 96a and the diagonal truss cord components 93 and 93a, respectively. The jacks are then operated to lower the movable roof sections so that the beams 102 and 102a of the frame assemblies 97 and 97a are seated on the upper ends of the diagonal truss chord components 93 and 93a. With the components thus positioned, the frame assemblies 97 and 97a are rigidly secured to the diagonal truss components 93 and 93a. The movable roof sections 83 and 830 are then swung inwardly so that their free ends engage. The sections 83 and 83a are rigidly interconnected by means of brace members 106 and gusset plates 107 nailed to the engaging truss components 105 and 1050.

With the roof sections thus assembled in their operative positions, several missing courses of asphalt shingles are applied to the roof system along the breaks between the various roof sections. In addition, the louver sections 112 are applied to the gable ends of the structure, and the missing trim board is nailed to the roof system overhanging the gables to complete the structure. Finally, the electrical, water and sewage lines of the structure are connected to the appropriate utility lines, and the building structure is ready for occupancy.

A third embodiment of the invention is illustrated in FIGS. 11 through 15. This embodiment consists of a prefabricated building structure 120 formed from an interior modular unit 121 and a pair of exterior modular units 122 and 123, disposed in side-by-side relation and rigidly secured together to form an integral structure. The interior modular unit 121 consists of a housing assembly 124 provided with a conventional floor system, exterior walls 125 mounted on the floor system, and interior junction walls 126, and a component roof system 127. The component roof system consists of a pitched roof section 128 which is seatable in a'lower or collapsed, inoperable position on the housing assembly 124, as illustrated in FIGS. 12 and 14, or seatable in an upper, operative position on a pair of support frames assemblies 129 and 130, as illustrated in FIGS. 11 and 13. The pitched roof section 128 consists of a plurality of transversely disposed, longitudinally spaced trusses 131 rigidly secured at their ends on pairs of transversely spaced, longitudinally disposed pairs of beams 132 and 133, and covered by conventional roofing including plywood sheathing, a layer of felt or other similar material and courses of asphalt shingles. Each of the trusses 131 includes a bottom chord member 134, a pair of diagonally disposed, top chord members 135 and 136 and a vertical member 137 interconnecting the inner ends of the top chord members 135 and 136 and the intermediate portion of the bottom chord member 134. The components of the trusses 131 are secured together by means of nail plates 138.

The support frame assemblies 129 and 130 are hingedly connected to the upper end of the housing assembly 125 by means of strap hinges 139 and 140. The spacing between the hinges is set at a proper dimension so that when the frame assemblies 129 and 130 are swung upwardly to vertical positions, the assemblies will be spaced apart a proper distance to permit the seating of the pairs of beams 132 and 133 on the upper ends thereof, as illustrated in FIGS. 11 and 13. The frame assembly 129 consists of a pair of longitudinally disposed beams 141 and 142 interconnected by a plurality of longitudinally spaced beams 143. Similarly, the support frame assembly 130 consists of a pair of Iongitudinally disposed beams 144 and 145 interconnected by a plurality of longitudinally spaced beams The exterior modular unit 122 is substantially similar in construction to the exterior modular unit 123, and includes a housing assembly 147 and a component roof system 148 supported on a housing assembly. The housing assembly 147 is provided with a conventional floor system, exterior walls 149 mounted on the floor system and an interior junction wall 150 which engages the junction wall 126 of the interior modular unit 121 when the modular units are secured together in side-byside relation to provide an integral structure. The exterior modular unit 123 similarly is provided with a housing assembly 147a on which there is supported a component roof system 148a. The housing assembly 1470 is provided with a conventional floor system, exterior walls mounted in the floor system, and an interior junction wall which engages an interior junction wall of the interior modular unit 121 when the units are.

disposed in side-by-side relation and secured together.

The component roof system 148 includes a stationary roof section 151, a movable roof section 152, and an overhang section 153. The stationary roof section 151 consists of a plurality of transversely disposed, longitudinally spaced bottom truss chord components 154, a plurality of vertical truss components 155 secured to the bottom truss components 154 intermediate the ends thereof, by means of nail plates, a plurality of top truss chord components 156 interconnecting the outer ends of the bottom truss components 154 and the upper ends of the vertical truss components 155, and a plurality of diagonal truss components 157 interconnecting the upper ends of the vertical components 155 and the inner ends of the bottom truss chord components 154. The top truss chord components 156 are set at a standard roof pitch and are adapted to be disposed in alignment with the truss sections 131 of the component roof system 127, when the roof system 127 is in its upwardly disposed, operative position as illustrated in H68. 11 and 13. Conventional roofing consisting of plywood sheathing, a layer of felt or similar material and asphalt shingles, is applied to the upper sides of the top truss chord components 156. In addition, the stationary roof section 151 is provided with a plurality of upwardly and slightly outwardly extending diagonal truss chord components 158 which are disposed at the inner ends of the bottom truss chord components 154 and secured thereto by means of nail plates.

The movable roof section 152 is provided with a plurality of top truss chord components 159 which are hingedly connected to the outer upper ends of the diagonal truss components 157, by means of strap hinges 160. Conventional roofing consisting of plywood sheathing, a layer of felt or similar material and asphalt shingles is applied to the upper sides of the on the diagonal truss components 158 to form a plurality of longitudinally spaced, diagonal truss components supporting the movable roof section 152, in an operative position, as illustrated in FIGS. 11 and 13, with the top truss chord components 159 disposed in alignment with the top truss chord components 156, and may be swung outwardly clear of the lower end of the frame as- .sembly 161 and rested on the diagonal truss chord components 157, to permit the movable roof section 152 to swing downwardly about the common longitudinal axis of hinges 160, and the lower end of the support frame assembly 161 to be seated on the upper ends of the diagonal truss components 158, as illustrated in FIGS. 12 and 14, whereby the movable roof section 152 will be disposed in a collapsed or inoperative positron.

The overhang section 153 consists of a plurality of spaced beams 169 hingedly connected to the outer ends of the top truss chord components 156 of the sta tionary roof section by means of strap hinges, a plurality of beams 170 nailed to the outer ends of the beams 169 and extending inwardly, and a longitudinally disposed strip 171 nailed to the inner ends of the beams 169 and 170. The overhang section further is provided with a fascia board nailed to the outer ends of the beams 169, a soffet nailed to the undersides of the beams 170 and roofing consisting of plywood members 135 of pitched roof section 127, the asphalt shingles are disposed in alignment to provide a continu- I ous roof line. The break between the top truss chord components 156 and 159 is sealed from the exterior by means of a strip of stretchable material bridging the break and secured to the sheathing on the top truss chord components 156 and 159.

sheathing, alayer of felt or similar material and asphalt shingles applied to the upper sides of the beams 169. The overhang section 153 may be swung into an inoperative position resting on the outer end of the stationary roof section 151', as illustrated in FIGS. 12 and 14, or swung into an operative position projecting laterally from the stationary roof section, as illustrated in FIGS. 11 and 13, to extend the roof line of the building structure. When the overhang section 169 is disposed in the operative position, the beams 169 are disposed in alignment with the top truss chord components 156 of the stationary roof section to provide a Depending from the inner ends of the top truss chord components 159 is a rigidly mounted support frame assembly 161 having a hingedly connected extension leg frame assembly 162. The frame assembly 16] consists of a longitudinally disposed beam 163 nailed to the undersides of theinner ends of the top truss chord components 159, a plurality of depending diagonal truss components 164 disposed in the same planes as the top truss chord components 159, and a longitudinally disposed beam 165 nailed to the undersides of the depending components 164. The extension leg frame as sembly 162 consists of a longitudinally disposed beam 166, a spaced, longitudinally disposed beam 167 and a plurality of longitudinally spaced, diagonal truss chord components 168 interconnecting the beams 166 and 167. As best illustrated in FIGS. 11 and- 13, the diagonal truss chord components 165 and 168 of frame assemblies 161 and 162 lie in the same transverse planes as the truss chord components 154 through 159. Furthermore, the frame assembly 162 is hingedly con nected to the lower end of the depending frame as sembly.16l by means of a plurality of strap hinges so that the frame assembly 162 may be swung inwardly and positioned in alignment with the frame assembly 161 and the diagonal truss components 158, and seated continuous roof line having a standard roof pitch. As best illustrated in FIG. 11, the gable ends ofthe modular units are provided with siding 172 which extends to a height even with the break between the top truss chord components 156 and 159. Above the siding 171, the opening is closed by louver sections which are applied at the erection site.

The modular units 121, 1.22 and 123 are prefabricated at a manufacturing site utilizing mass production methods and techniques. When the units have been completed, the roof systems 127, l48'and 148a of the modular units 121, 122 and 123 are collapsed into their inoperative positions for transit. This is accomplished with the exterior modular unit 122 by swinging the overhang section 152 inwardly so that it comes to rest on the stationary roof section 151, lifting the movable roof section 152 slightly to remove the load on the frame assembly 162 and then swinging the frame assembly inwardly, and then lowering the movable roof section 152 to permit the lower end of the frame assembly 161 to be seated on the upper ends of the diagonal truss components 158 and the frame assembly 161 to reston a truss components 157. The roof system 148 of the exterior modular unit 123 is collapsed into an inoperative position in a similar manner.

The modular unit 121 is prepared for shipment by swinging the Support frame assemblies 129 and 130 inwardly to rest on the upper end of the housing structure 125, and lowering the roof section 128 so that the pairs of beams 132 and 133 are seated on the upper end of the housing structure 125, stradling the frame assemblies 129 and 130.

When the roof systems for the modular units 121, 122 and 123 have been collapsed into their inoperative positions, providing compact units of minimum width and height, the units are loaded on trailers or dolleys and hauled over public highways to an erection site provided with a foundation. The interior modular unit 121 is the first unit transferred onto the foundation, and is situated in the center of the foundation, permitting space for the exterior modular units on opposite sides thereof. Once the interior modular unit has been set in place on the foundation, lifting jacks are placed between the upper end of the housing assembly 125 and the roof system 127, and the roof system 127 is jacked up to slightly above its upwardly disposed operative position. The support frame assemblies 129 and 130 are then swung upwardly and the roof section 127 is lowered so that the pairs of beams 132 and 133 are seated on the upper ends of the support frame assemblies 129 and 130. The erection of the modular unit 121 is then completed by rigidly connecting the roof section 127 to the support frame assemblies 129 and 130, and removing the jacks. The exterior modular units 122 and 123 are then transferred onto the foundation so that the units are disposed in side-by-side relation with the interior modular unit 121 interposed between the exterior modular units 122 and .123. With the units thus positioned, they are rigidly bolted together.

Next, lifting jacks are placed at positions spaced along the lengths of the movable roof sections 152 and 152a, and such sections are jacked up to the positions as illustrated in FIGS. 11 and 13. With the jacks carrying the load of the movable roof sections, the frame assemblies 162 and 162a are swung inwardly into alignment with the frame assemblies 161 and 1610 and the diagonal truss components 158 and 158a, respectively. The jacks are then operated to lower the movable roof sections so that the beams 167 and 167a of the frame assemblies 162 and 162a are seated on the upper ends of the diagonal truss components 158 and 158a, respectively.

With the movable roof sections of the exterior modular units thus assembled in their operative positions, the overhang sections 153 and 153a are swung outwardly to provide a building structure having a pitched roof configuration of standard pitch. The roof is then completed by applying courses of asphalt shingles along the breaks between the various roof sections. Finally, the louver sections are applied to the gable ends of the structure, and the missing trim board is nailed to the roof system overhanging the gables, to complete the structure. The electrical, water and sewage lines of the structure are then connected to the appropriate utility lines, and the building structure is ready for occupancy.

The interiors of the modular units as described herein, are completely finished at the manufacturing site so that upon securing the modular units together and assembling the roof systems, no further work need be done to the interiors of the units. It is contemplated that the interiors of the modular units be provided with conventional partition walls, sheet rock or wood panelling applied to the interior walls, and conventional floor coverings including hard wood, resilient tile and ceramic tile floors. The units further would be provided with kitchen cabinets and appliances, bathroom cabinets and fixtures, lighting fixtures, and electrical, heating and plumbing systems.

In each of the embodiments as described, it will be noted that there is provided a prefabricated building structure having a pitched roof configuration of a standard pitch, in which the structures are formed of modular units which can be packaged in compact units having widths and heights falling within permissible limits imposed by law with respect to the hauling of such units over the public highways. The design of the unit combines the advantages of utilizing mass production methods and techniques for prefabricating the components of the building structures, and providing a finished product which is comparable in quality and aesthetic appeal to building structures erected entirely at a building site.

From the foregoing detailed description, it will be evident that there are a number of changes, adaptations and modifications of the present invention which come within the province of those skilled in the art. However, it is intended that all such variations not departing from the spirit of the invention be considered as within the scope thereof as limited solely by the appended claims.

lclaim:

l. A prefabricated building structure comprising at least two modular units secured together in side-by-side relation to provide an integral building structure, each of said modular units having a complementary roof system including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having a longitudinally aligned, upwardly projecting and rigidly secured seating means, said movable roof section having a rigidly connected, longitudinally disposed depending support means and a longitudinally disposed extension leg hingedly connected to said depending support means wherein said extension leg is movable away from said seating means and said depending support means is seatable on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg is movable between said depending support means and said seating means and is seatable on said seating means to support said movable roof section in an upwardly disposed, operative position, means rigidly interconnecting the opposed free ends of said movable roof sections of said complementary roof systems when said movable roof sections are upwardly disposed in said operative positions, and means for covering said roof systems when said movable roof sections are disposed in said operative positions.

2. A prefabricated building structure according to Claim 1 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, which may be disposed in laterally projecting positions to extend the roof line of said building structure.

3. A prefabricated building structure according to claim 1 wherein said stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof section of each of said roof systems includes a planar surface disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof sections are upwardly disposed in said operative positions, whereby said stationary and movable roof sections cooperate to provide a pitched roof configuration.

4. A prefabricated building structure according to claim 3 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position to extend the roof line of said pitched roof configuration.

5. A prefabricated building structure according to claim 1 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.

6. A prefabricated building structure according to claim 1 wherein said covering means includes sheathing applied to said roof sections and roofing material applied to said sheathing.

7. A prefabricated building structure according to claim 6. including stretchable sealing means bridging the hinged sides of said stationary and movable roof sections.

8. A prefabricated building structure according to claim 1 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses, when said movable roof sections are interconnected in their upwardly disposed operative positions.

9. A prefabricated building structure according to claim 1 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, the stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof section hingedly connected thereto includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary movable roof sections cooperate to provide a pitched roof configuration, said covering means includes sheathing applied to said roof sections, stretchable sealing means bridging the hinged sides of said stationary and movable roof sections and roofing material applied to said sheathing, and including longitudinally disposed overhang sections hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position to extend the roof line of said pitched roof configuration.

10. A prefabricated building structure according to claim 9 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses when said modular units are disposed in side-byside relation, and said movable roof sections are disposed in their operative positions with the opposed free ends thereof rigidly interconnected.

11. A modular unit adapted to be positioned in sideby-side relation and secured to at least one similar modular unit to form a prefabricated building structure comprising a housing assembly including a floor system, exterior wall panels, at least one interior wall panel disposable adjacent said similar modular unit, and a complementary roof system cooperable with a similar roof system of said similar modular unit to form a complete. roof system, said complementary roof system including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having longitudinally aligned, upwardly projecting and rigidly secured seating means, said movable roof section having rigidly connected, longitudinally disposed depending support means and a longitudinally disposed extension leg hingedly connected to said depending support means wherein said extension leg is movable away from said seating means and said depending support means is seatable on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg is movable between said support means and said seating means and is seatable on said seating means to support said movable roof section in an upwardly disposed, operative position, to be rigidly interconnected with a similar complementary roof system, and means for covering said roof system.

12. A modular unit according to claim 1 1 including a longitudinally disposed overhang section hingedly connected along a longitudinal axis to an outer side of said stationary roof section, which may be swung onto said stationary roof section into an inoperative position, and swung away from said stationary roof section into a laterally projecting operative position.

13. A modular unit according to claim 11 wherein said stationary roof section includes a transversely inclined, planar surface and said movable roof section includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration.

l4. Amodular unit according to claim 13 including a longitudinally disposed overhang section hingedly con nected to said stationary roof section, whereby said overhang section can be swung onto said stationary roof section, into an inoperative position, and swung away from said stationary roof section, into a laterally projecting operative position, said overhang section having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in said operative position, to extend the roof line of said roof system. 15. A modular unit according to claim 11 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies,

16. A modular unit according to claim 11 wherein said covering means includes sheathing mounted on said roof sections and a roofing material applied to said sheathing.

17. A modular unit according to claim 16 including stretchable sealing means bridging the hinged sides of said stationary and movable roof sections.

18. A modular unit according to claim 11 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, said stationary roof section includes a transversely inclined, planar surface and said movableroof section includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration, and said covering means includes sheathing mounted on said roof sections, stretchable sealing means bridging the hinged sides of said stationary and movable roof sections, and a roofing material applied to said sheathing, and including a longitudinally disposed overhang section hingedly connected to said stationary roof section along a longitudinal axis, movable onto said stationary roof section into an inoperative position, and away from said stationary roof section, into a laterally projecting operative position, said overhang section having a planar surface disposable in alignment with the planar surface of said stationary roof section when said overhang section is disposed in said operative position to extend the roof line of said roof system.

19. A prefabricated building structure comprising at least three modular units secured together in side by side relation to provide an integral building structure, said modular units including an interior modular unit interposed between a pair of exterior modular units, each of said exterior modular units having a complementary roof system including a longitudinally disposed stationary roof section, a first longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, and a second longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said first movable roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said first movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said depending support means and said seating means and seated on said seating means to support said first movable roof section in an upwardly disposed, operative position, said second movable roof section being swingable outwardly onto said first movable roof section, in an inoperative position, and swingable inwardly, overlying a portion of said interior modular unit and engageable at its free end with the free end of the second movable roof section of the complementary roof system of the other of said exterior modular units, into an operative position, means rigidly interconnecting the opposed free ends of said second movable roof sections of said complementary roof systems when said movable roof sections are disposed in said operative positions, and means for covering said roof systems when said movable roof sections are disposed in said operative positions.

20. A prefabricated building structure according to claim 19 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof section, which may be swung onto said stationary roof sections, into inoperative positions,

and swung into laterally projecting operative positions to extend the roof line of said building structure.

21. A prefabricated building structure according to claim 19 wherein said stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the hingedly movable roof sections include planar surfaces disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections of said complementary roof systems cooperate to provide a pitched roof configuration.

22. A prefabricated building structure according to claim 21 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a transversely projecting operative position, to extend the roof line of said, pitched roof configuration.

23. A prefabricated building structure according to claim 19 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.

24. A prefabricated building structure according to claim 19 wherein said covering means includes sheathing applied to said roof sections and a roofing material applied to said sheathing.

25. A prefabricated building structure according to claim 24 including stretchable sealing means bridging the hinged sides of said roof sections.

26. A prefabricated building structure according to claim 19 wherein the components of said roof sections fonn transversely disposed, longitudinally spaced trusses, when said movable roof sections are interconnected in their upwardly disposed operative positions.

27. A prefabricated building structure according to claim 19 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, the stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof sections thereof include planar surfaces disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a pitched roof configuration, said cover means includes sheathing applied to said roof sections, stretchable sealing means bridging the side edges of said stationary and movable roof sections hingedly connected together,

and roofing material applied to said sheathing, and including longitudinally disposed overhang sections hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a transversely projecting operative position, to extend the roof line of said pitched roof configuration.

28. A prefabricated building structure according to claim 27 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses when said modular units are disposed in side-byside relation, and said movable roof sections are disposed in their operative positions with the opposed free ends thereof rigidly interconnected.

29. A modular unit adapted to the position in spaced relation and secured to at least one similar modular unit to form a prefabricated building structure comprising a housing assembly including a floor system, exterior wall panels, at least one interior wall panel disposable in spaced relation to an interior wall panel of Said similar modular unit, and a complementary roof system disposed on said housing assembly and cooperable with a similar roof system of said similar modular unit to form a complete roof system, said complementary roof system including a longitudinally disposed stationary roof section, a longitudinally disposed first movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidlyconnected, de pending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said first movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said support means and said seating means and seated on said seating means to support said first movable section in an upwardly disposed, operative position, and a second movable roof section hingedly connected to said first movable roof section along a longitudinal axis, movable outwardly onto said first movable roof section, in an inoperative position and movable to an inwardly projecting operative position engageable at its free end to the free end of the second movable roof section of the complementary roof system of said similar modular unit, projecting inwardly in its operative position, and means for covering said roof system.

30. A modular unit according to claim 29 including longitudinally disposed overhang section hingedly connected along a longitudinal axis to an outer side of said stationary roof section, which may be swung toward and onto said stationary roof section in an inoperative position, and swung away from said stationary roof section, projecting laterally of said stationary roof section, in an operative position.

31. A modular unit according to claim 29 wherein said stationary roof section includes a transversely inclined, planar surface, and said movable roof sections include planar surfaces disposed in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration.

32. A modular unit according to claim 31 including a longitudinally disposed overhang section hingedly connected to said stationary roof section, whereby said overhang section can be swung toward and onto said stationary roof section, in an inoperative position, and swung away from saidstationary roof section, projecting laterally from said stationary roof section in an operative position, said overhang section having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhead section is disposed in said operative position, to extend the roof line of said roof system. 7

33. A modular unit according to claim 29 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.

34. A modular unit according to claim 29 wherein said covering means includes sheathing applied to said roof sections and a roofing material applied to said sheathing.

35. A modular unit according to-claim 34 including stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections.

36. A modular unit according to claim 29 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, said stationary roof section includes a transversely inclined, planar surface and said movable roof sections include planar surfaces disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration, and said covering means includes sheathing; applied to said roof sections, stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections, and a roofing material applied to said sheathing, and including a longitudinally disposed overhang section hingedly connected to said stationary roof section along a longitudinal axis, movable onto said stationary roof section in an inoperative position, and away from said stationary roof section projecting laterally therefrom, in an operative position, said overhang section having a planar surface disposable in alignment with the planar surface of said stationary roof section when said overhang section is disposed in said operative position, to extend the roof line of said roof system.

37. A prefabricated building structure comprising at least three modular units secured together in side-byside relation to provide an integral building structure, said modular units including an interior modular unit interposed between a pair of exterior modular units, said interior modular unit having a collapsible roof system and said exterior modular units having component roof systems cooperating with the collapsible roof system of said interior modular unit to provide an integral roof system for said structure, each of said component roof systems of said exterior modular units including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having an upwardly projecting seating means, said movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said depending support means and said seating means and seated on said seating means to support said movable roof section in an upwardly disposed, operative position, means rigidly interconnecting the opposed free ends of said movable roof sections and the component roof system of said interior modular unit when said movable roof sections are upwardly disposed in their operative positions, and means for covering said roof systems when said movable roof sections are disposed in their operative positions.

'38. A prefabricated building structure according to claim 37 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections whereby said overhang sections may be swung inwardly and supported on said stationary roof sections, in inoperative positions, and swung outwardly to laterally projecting operative positions, to extend the roof line of said building structure.

39. A prefabricated building structure according to claim 37 wherein said stationary roof section of each of said roof systems of said exterior modular units includes a transversely inclined, planar surface, the movable roof section of each of said roof systems of said exterior modular units includes a planar surface disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof section is outwardly disposed in its operative position, and said collapsible component roof system of said interior modular unit includes inclined surfaces disposed in the same planes as the transversely inclined surfaces of said stationary roof sections of said exterior modular units.

40. A prefabricated building structure according to claim 39 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposed in the same plane as the transversely inclined surface of the stationary roof section to which said overhead section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position, to extend the roof line of said pitched roof configuration.

41. A prefabricated building structure according to claim 37 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.

42. A prefabricated building structure according to claim 37 wherein said covering means includes sheathing applied to said roof sections and said collapsible roof system and roofing material applied to said sheathing.

43. A prefabricated building structure according to claim 42 including stretchable sealing means bridging the hingedly connected sides of said stationary andv movable roof sections.

44. A prefabricated building structure according to claim 37 wherein the components of said roof sections of the roof systems of said exterior modular units and the components of the collapsible roof system of said interior modular unit form transversely disposed, longitudinally spaced trusses, when said movable roof sections are connected to the roof system of said interior modular unit, in their operative positions.

45. A prefabricated building structure according to claim 37 wherein said depending support means and said extension leg of the roof system of said exterior modular unit comprise longitudinally disposed frame assemblies, the stationary roof section of each of said component roof systems of said exterior modular units includes a transversely inclined planar surface and the movable roof section hingedly connected thereto includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in its operative position, and said collapsible roof system of said interior modular unit includes inclined surfaces disposed in the same planes as the transversely inclined surfaces of said stationary roof sections whereby said stationary and movable roof sections of said exterior modular units and said collapsible roof system of said interior modular unit cooperate to provide a pitched roof configuration, and said covering means includes sheathing applied to said roof sections and said collapsible roof system, stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections and roofing material applied to said sheathing, and including longitiidinally disposed overhang sections, hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position, to extend the roof line of said pitched roof configuration.

46. A prefabricated building structure comprising at least a pair of spaced modular units, each of said modular units having a complementary roof system cooperable with a similar complementary roof system of the other of said modular units, including a longitudinally disposed stationary roof section, a first longitudinally disposed movable roof section hingedly connected along a longitudinal axes to said stationary roof section, and a second longitudinally disposed movable roof section hingedly connected along a longitudinal axes to said first movable roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means, whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said movable roof section in a downwardly disposed, inoperative position and said extension leg may be moved between said depending support means and said seating means and seated 'on said seating means to support said first movable roof section in an upwardly disposed, operative position, said second movable roof section being movable outwardly onto said first movable section, in an inoperative position, and movable to an inwardly projecting operable position, engageable at its free end with the free end of the second movable section of the complementary roof system of the other of said modular units, in an operative position, means rigidly interconnecting the opposed free ends of said second movable roof sections of said complementary roof systems when said movable roof sections are disposed in their operative positions, and means for covering said roof systems when said movable roof sections are disposed in their operative positions.

47. A prefabricated building structure according to claim 1 wherein each of the gable ends of said modular units includes a permanent gable section and a second gable section applied between said permanent gable section and the movable roof section thereof when said movable roof section is in its upwardly disposed, operative position.

48. A prefabricated building structure according to claim 47 wherein said second gable section is louvered.

49. A prefabricated building structure according to claim 19 wherein each of the gable ends of said modular units includes a permanent gable section and a second gable section applied between said permanent section and the movable roof section thereof when said movable roof is in its upwardly disposed, operative position.

50. A prefabricated building unit accordingto claim 49 wherein said second gable section is louvered.

51. A prefabricated building structure according to claim 37 wherein each of the gable ends of the modular units includes a permanent gable section and a second gable section applied between said permanent gable section and the movable roof section thereof when said movable roof section is in its upwardly disposed, ope rative position.

52. A prefabricated building structure according to claim 51 wherein said gable section is louvered. 

1. A prefabricated building structure comprising at least two modular units secured together in side-by-side relation to provide an integral building structure, each of said modular units having a complementary roof system including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having a longitudinally aligned, upwardly projecting and rigidly secured seating means, said movable roof section having a rigidly connected, longitudinally disposed depending support means and a longitudinally disposed extension leg hingedly connected to said depending support means wherein said extension leg is movable away from said seating means and said depending support means is seatable on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg is movable between said depending support means and said seating means and is seatable on said seating means to support said movable roof section in an upwardly disposed, operative position, means rigidly interconnecting the opposed free ends of said movable roof sections of said complementary roof systems when said movable roof sections are upwardly disposed in said operative positions, and means for covering said roof systems when said movable roof sections are disposed in said operative positions.
 2. A prefaBricated building structure according to Claim 1 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, which may be disposed in laterally projecting positions to extend the roof line of said building structure.
 3. A prefabricated building structure according to claim 1 wherein said stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof section of each of said roof systems includes a planar surface disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof sections are upwardly disposed in said operative positions, whereby said stationary and movable roof sections cooperate to provide a pitched roof configuration.
 4. A prefabricated building structure according to claim 3 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position to extend the roof line of said pitched roof configuration.
 5. A prefabricated building structure according to claim 1 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.
 6. A prefabricated building structure according to claim 1 wherein said covering means includes sheathing applied to said roof sections and roofing material applied to said sheathing.
 7. A prefabricated building structure according to claim 6 including stretchable sealing means bridging the hinged sides of said stationary and movable roof sections.
 8. A prefabricated building structure according to claim 1 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses, when said movable roof sections are interconnected in their upwardly disposed operative positions.
 9. A prefabricated building structure according to claim 1 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, the stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof section hingedly connected thereto includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary movable roof sections cooperate to provide a pitched roof configuration, said covering means includes sheathing applied to said roof sections, stretchable sealing means bridging the hinged sides of said stationary and movable roof sections and roofing material applied to said sheathing, and including longitudinally disposed overhang sections hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position to extend the roof line of said pitched roof configuration.
 10. A prefabricated building structure according to claim 9 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses when said modular units are disposed in side-by-side relation, and said movable roof sections are disposed in their operative positions with the opposed free ends thereof rigidly interconnected.
 11. A modular unit adapted to be positioned in side-by-side relation and secured to at least one similar modular unit to form a prefabricated building structure comprising a housing assembly including a floor system, exterior wall panels, at least one interior wall panel disposable adjacent said similar modular unit, and a complementary roof system cooperable with a similar roof system of said similar modular unit to form a complete roof system, said complementary roof system including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having longitudinally aligned, upwardly projecting and rigidly secured seating means, said movable roof section having rigidly connected, longitudinally disposed depending support means and a longitudinally disposed extension leg hingedly connected to said depending support means wherein said extension leg is movable away from said seating means and said depending support means is seatable on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg is movable between said support means and said seating means and is seatable on said seating means to support said movable roof section in an upwardly disposed, operative position, to be rigidly interconnected with a similar complementary roof system, and means for covering said roof system.
 12. A modular unit according to claim 11 including a longitudinally disposed overhang section hingedly connected along a longitudinal axis to an outer side of said stationary roof section, which may be swung onto said stationary roof section into an inoperative position, and swung away from said stationary roof section into a laterally projecting operative position.
 13. A modular unit according to claim 11 wherein said stationary roof section includes a transversely inclined, planar surface and said movable roof section includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration.
 14. A modular unit according to claim 13 including a longitudinally disposed overhang section hingedly connected to said stationary roof section, whereby said overhang section can be swung onto said stationary roof section, into an inoperative position, and swung away from said stationary roof section, into a laterally projecting operative position, said overhang section having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in said operative position, to extend the roof line of said roof system.
 15. A modular unit according to claim 11 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.
 16. A modular unit according to claim 11 wherein said covering means includes sheathing mounted on said roof sections and a roofing material applied to said sheathing.
 17. A modular unit according to claim 16 including stretchable sealing means bridging the hinged sides of said stationary and movable roof sections.
 18. A modular unit according to claim 11 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, said stationary roof section includes a transversely inclined, planar surface and said movable roof section includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in said operative position, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration, and said covering means includes sheathing mounted on said roof sections, stretchable sealing means bridging the hinged sides of said stationary and movable roof sections, and a roofing maTerial applied to said sheathing, and including a longitudinally disposed overhang section hingedly connected to said stationary roof section along a longitudinal axis, movable onto said stationary roof section into an inoperative position, and away from said stationary roof section, into a laterally projecting operative position, said overhang section having a planar surface disposable in alignment with the planar surface of said stationary roof section when said overhang section is disposed in said operative position to extend the roof line of said roof system.
 19. A prefabricated building structure comprising at least three modular units secured together in side by side relation to provide an integral building structure, said modular units including an interior modular unit interposed between a pair of exterior modular units, each of said exterior modular units having a complementary roof system including a longitudinally disposed stationary roof section, a first longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, and a second longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said first movable roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said first movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said depending support means and said seating means and seated on said seating means to support said first movable roof section in an upwardly disposed, operative position, said second movable roof section being swingable outwardly onto said first movable roof section, in an inoperative position, and swingable inwardly, overlying a portion of said interior modular unit and engageable at its free end with the free end of the second movable roof section of the complementary roof system of the other of said exterior modular units, into an operative position, means rigidly interconnecting the opposed free ends of said second movable roof sections of said complementary roof systems when said movable roof sections are disposed in said operative positions, and means for covering said roof systems when said movable roof sections are disposed in said operative positions.
 20. A prefabricated building structure according to claim 19 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof section, which may be swung onto said stationary roof sections, into inoperative positions, and swung into laterally projecting operative positions to extend the roof line of said building structure.
 21. A prefabricated building structure according to claim 19 wherein said stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the hingedly movable roof sections include planar surfaces disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections of said complementary roof systems cooperate to provide a pitched roof configuration.
 22. A prefabricated building structure according to claim 21 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a transversely projecting operative position, To extend the roof line of said pitched roof configuration.
 23. A prefabricated building structure according to claim 19 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.
 24. A prefabricated building structure according to claim 19 wherein said covering means includes sheathing applied to said roof sections and a roofing material applied to said sheathing.
 25. A prefabricated building structure according to claim 24 including stretchable sealing means bridging the hinged sides of said roof sections.
 26. A prefabricated building structure according to claim 19 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses, when said movable roof sections are interconnected in their upwardly disposed operative positions.
 27. A prefabricated building structure according to claim 19 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, the stationary roof section of each of said roof systems includes a transversely inclined, planar surface and the movable roof sections thereof include planar surfaces disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a pitched roof configuration, said cover means includes sheathing applied to said roof sections, stretchable sealing means bridging the side edges of said stationary and movable roof sections hingedly connected together, and roofing material applied to said sheathing, and including longitudinally disposed overhang sections hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a transversely projecting operative position, to extend the roof line of said pitched roof configuration.
 28. A prefabricated building structure according to claim 27 wherein the components of said roof sections form transversely disposed, longitudinally spaced trusses when said modular units are disposed in side-by-side relation, and said movable roof sections are disposed in their operative positions with the opposed free ends thereof rigidly interconnected.
 29. A modular unit adapted to the position in spaced relation and secured to at least one similar modular unit to form a prefabricated building structure comprising a housing assembly including a floor system, exterior wall panels, at least one interior wall panel disposable in spaced relation to an interior wall panel of said similar modular unit, and a complementary roof system disposed on said housing assembly and cooperable with a similar roof system of said similar modular unit to form a complete roof system, said complementary roof system including a longitudinally disposed stationary roof section, a longitudinally disposed first movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said first movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said support means and said seating means and seated on said seating means to support said first movable section in an upwardly disposed, operative position, and a second movable roof section hingedly connected to said first movable roof section along a longitudinal axis, mOvable outwardly onto said first movable roof section, in an inoperative position and movable to an inwardly projecting operative position engageable at its free end to the free end of the second movable roof section of the complementary roof system of said similar modular unit, projecting inwardly in its operative position, and means for covering said roof system.
 30. A modular unit according to claim 29 including longitudinally disposed overhang section hingedly connected along a longitudinal axis to an outer side of said stationary roof section, which may be swung toward and onto said stationary roof section in an inoperative position, and swung away from said stationary roof section, projecting laterally of said stationary roof section, in an operative position.
 31. A modular unit according to claim 29 wherein said stationary roof section includes a transversely inclined, planar surface, and said movable roof sections include planar surfaces disposed in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration.
 32. A modular unit according to claim 31 including a longitudinally disposed overhang section hingedly connected to said stationary roof section, whereby said overhang section can be swung toward and onto said stationary roof section, in an inoperative position, and swung away from said stationary roof section, projecting laterally from said stationary roof section in an operative position, said overhang section having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhead section is disposed in said operative position, to extend the roof line of said roof system.
 33. A modular unit according to claim 29 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.
 34. A modular unit according to claim 29 wherein said covering means includes sheathing applied to said roof sections and a roofing material applied to said sheathing.
 35. A modular unit according to claim 34 including stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections.
 36. A modular unit according to claim 29 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies, said stationary roof section includes a transversely inclined, planar surface and said movable roof sections include planar surfaces disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof sections are upwardly disposed in their operative positions, whereby said stationary and movable roof sections cooperate to provide a portion of a pitched roof configuration, and said covering means includes sheathing applied to said roof sections, stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections, and a roofing material applied to said sheathing, and including a longitudinally disposed overhang section hingedly connected to said stationary roof section along a longitudinal axis, movable onto said stationary roof section in an inoperative position, and away from said stationary roof section projecting laterally therefrom, in an operative position, said overhang section having a planar surface disposable in alignment with the planar surface of said stationary roof section when said overhang section is disposed in said operative position, to extend the roof line of said roof system.
 37. A prefabricated building structure comprising at least three modular units secured together in side-by-side relation to provide an integral building structure, said modular units including an interior modular unit interposed between a pair of exteriOr modular units, said interior modular unit having a collapsible roof system and said exterior modular units having component roof systems cooperating with the collapsible roof system of said interior modular unit to provide an integral roof system for said structure, each of said component roof systems of said exterior modular units including a longitudinally disposed stationary roof section and a longitudinally disposed movable roof section hingedly connected along a longitudinal axis to said stationary roof section, said stationary roof section having an upwardly projecting seating means, said movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said movable roof section in a downwardly disposed, inoperative position, and said extension leg may be moved between said depending support means and said seating means and seated on said seating means to support said movable roof section in an upwardly disposed, operative position, means rigidly interconnecting the opposed free ends of said movable roof sections and the component roof system of said interior modular unit when said movable roof sections are upwardly disposed in their operative positions, and means for covering said roof systems when said movable roof sections are disposed in their operative positions.
 38. A prefabricated building structure according to claim 37 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections whereby said overhang sections may be swung inwardly and supported on said stationary roof sections, in inoperative positions, and swung outwardly to laterally projecting operative positions, to extend the roof line of said building structure.
 39. A prefabricated building structure according to claim 37 wherein said stationary roof section of each of said roof systems of said exterior modular units includes a transversely inclined, planar surface, the movable roof section of each of said roof systems of said exterior modular units includes a planar surface disposable in the same plane as the transversely inclined surface of the hingedly connected stationary roof section when said movable roof section is outwardly disposed in its operative position, and said collapsible component roof system of said interior modular unit includes inclined surfaces disposed in the same planes as the transversely inclined surfaces of said stationary roof sections of said exterior modular units.
 40. A prefabricated building structure according to claim 39 including longitudinally disposed overhang sections hingedly connected along longitudinal axes to said stationary roof sections, each of said overhang sections having a planar surface disposed in the same plane as the transversely inclined surface of the stationary roof section to which said overhead section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position, to extend the roof line of said pitched roof configuration.
 41. A prefabricated building structure according to claim 37 wherein said depending support means and said extension leg comprise longitudinally disposed frame assemblies.
 42. A prefabricated building structure according to claim 37 wherein said covering means includes sheathing applied to said roof sections and said collapsible roof system and roofing material applied to said sheathing.
 43. A prefabricated building structure according to claim 42 including stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections.
 44. A prefabricated building structure according to claim 37 wherein the components of said roof sections of the roof systems of said exterior modular units and the components of the collapsible roof system of said interior modular unit form transversely disposed, longitudinally spaced trusses, when said movable roof sections are connected to the roof system of said interior modular unit, in their operative positions.
 45. A prefabricated building structure according to claim 37 wherein said depending support means and said extension leg of the roof system of said exterior modular unit comprise longitudinally disposed frame assemblies, the stationary roof section of each of said component roof systems of said exterior modular units includes a transversely inclined planar surface and the movable roof section hingedly connected thereto includes a planar surface disposable in the same plane as the transversely inclined surface of said stationary roof section when said movable roof section is upwardly disposed in its operative position, and said collapsible roof system of said interior modular unit includes inclined surfaces disposed in the same planes as the transversely inclined surfaces of said stationary roof sections whereby said stationary and movable roof sections of said exterior modular units and said collapsible roof system of said interior modular unit cooperate to provide a pitched roof configuration, and said covering means includes sheathing applied to said roof sections and said collapsible roof system, stretchable sealing means bridging the hingedly connected sides of said stationary and movable roof sections and roofing material applied to said sheathing, and including longitudinally disposed overhang sections, hingedly connected to said stationary roof sections along longitudinal axes, each of said overhang sections having a planar surface disposable in alignment with the planar surface of the stationary roof section to which said overhang section is hingedly connected, when said overhang section is disposed in a laterally projecting operative position, to extend the roof line of said pitched roof configuration.
 46. A prefabricated building structure comprising at least a pair of spaced modular units, each of said modular units having a complementary roof system cooperable with a similar complementary roof system of the other of said modular units, including a longitudinally disposed stationary roof section, a first longitudinally disposed movable roof section hingedly connected along a longitudinal axes to said stationary roof section, and a second longitudinally disposed movable roof section hingedly connected along a longitudinal axes to said first movable roof section, said stationary roof section having upwardly projecting seating means, said first movable roof section having rigidly connected, depending support means and an extension leg hingedly connected to said depending support means, whereby said extension leg may be moved away from said seating means and said depending support means may be seated on said seating means to support said movable roof section in a downwardly disposed, inoperative position and said extension leg may be moved between said depending support means and said seating means and seated on said seating means to support said first movable roof section in an upwardly disposed, operative position, said second movable roof section being movable outwardly onto said first movable section, in an inoperative position, and movable to an inwardly projecting operable position, engageable at its free end with the free end of the second movable section of the complementary roof system of the other of said modular units, in an operative position, means rigidly interconnecting the opposed free ends of said second movable roof sections of said complementary roof systems when said movable roof sections are disposed in their operative positions, and means for covering said roof systems when said movable roof sections are disposed in their operative positions.
 47. A prefabricated building structure according to claim 1 wherein each of the gable ends of said modular units includes a permanent gable section and a second gable section applied between saiD permanent gable section and the movable roof section thereof when said movable roof section is in its upwardly disposed, operative position.
 48. A prefabricated building structure according to claim 47 wherein said second gable section is louvered.
 49. A prefabricated building structure according to claim 19 wherein each of the gable ends of said modular units includes a permanent gable section and a second gable section applied between said permanent section and the movable roof section thereof when said movable roof is in its upwardly disposed, operative position.
 50. A prefabricated building unit according to claim 49 wherein said second gable section is louvered.
 51. A prefabricated building structure according to claim 37 wherein each of the gable ends of the modular units includes a permanent gable section and a second gable section applied between said permanent gable section and the movable roof section thereof when said movable roof section is in its upwardly disposed, operative position.
 52. A prefabricated building structure according to claim 51 wherein said gable section is louvered. 